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  • Electrical charge goes through a change in potential difference = energy is transferred
  • Energy is supplied to the charge at the power source = raise it through a potential
  • Charge falls through any potential drop in components = charge gives up energy
  • Energy transferred (J) = Charge Flow (C) X Potential Difference (V)
  • E=QV
  • Bigger potential difference battery = supplies more energy to circuit for every coulomb of charge which flows around it as the charge is raised higher up at the circuit
  • Power (W) = Potential Difference (V) X Current (A)
  • P=VI
  • Power = current squared X resistance
  • P= I²R

How long have you…? (present perfect 4) Exercises


 

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Use the information given to create questions beginning with ‘How long…?’

• It is snowing.

• The weather is shining.

• John and Kate are married.

• My brother has gone on holiday.

• My aunty and uncle live in Canada.

• My sister is a teacher.

• I work at the chemist.

• I’ve known Susan since I was a baby.

• Jonathan is learning to speak to Mandarin.

 

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Fill in the missing gaps in the sentences using the present perfect (=has/have + past participle)

• I have known Kate a long time.

• My brother has been playing the piano he was 11 years old.

• My mum and dad on holiday to America. They

gone since last Sunday.

• I Ben and Emma since primary school.

We to the same primary and secondary school.

• My sister learning to speak French because she
is going to France next month.

 

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Use the appropriate words in the missing gaps.

have you lived       lives      to

has been       works        have known

I have bought       have worked.

• My sister in Spain. She is studying Spanish

with her friend Rosie. I Rosie since I was 5.

• Spencer like with Jamie. They have worked

together for 2 years.

• How long in Australia?

• a new dress for prom.

• He to Thorpe park.

 

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Challenge: Create 4 of your own questions beginning with ‘How long……?’

1.

2.

3.

4.

 

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With the decision to try.” Gail Dever

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